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https://bugzilla.mozilla.org/show_bug.cgi?id=823228
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  <title>Test for Bug 823228</title>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=823228">Mozilla Bug 823228</a>
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  <iframe name="y" id="y"></iframe>
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<pre id="test">
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  <script type="application/javascript">

  /** Test for Bug 823228 **/
  is(window, window.frames, "These better be equal");
  ok("0" in window, "We have a subframe");
  ok("1" in window, "We have two subframes");
  ok(!("2" in window), "But we don't have three subframes");
  window[2] = "myString";
  ok(!("2" in window), "Should not be able to set indexed expando");
  Object.getPrototypeOf(window)[3] = "Hey there";
  ok("3" in window, "Should be walking up the proto chain");

  is(window[0].name, "x", "First frame is x");
  is(window[1].name, "y", "Second frame is y");
  is(window[2], undefined, "We should still not have our expando");
  is(window[3], "Hey there", "We should still have our prop on the proto chain");

  var x = $("x");
  var y = $("y");

  is(x.contentWindow, window[0], "First frame should have correct window");
  is(y.contentWindow, window[1], "Second frame should have correct window");

  // set() hook test
  throws(TypeError, function () {
    "use strict";
    window[1] = "FAIL strict";
  });

  // set() hook test
  window[1] = "FAIL";
  is(window[1].name, "y", "Second frame is still y");
  y.parentNode.removeChild(y);
  ok(!("1" in window), "We no longer have two subframes");
  is(window[1], undefined, "We should not have a value here");

  // defineProperty() hook test
  function throws(errorCtor, f) {
    try {
      f();
    } catch (exc) {
      if (!(exc instanceof errorCtor))
        throw exc;
      return;
    }
    throw new Error("expected " + errCtor.name + ", no exception thrown: " + f);
  }

  x.parentNode.appendChild(y);
  throws(TypeError, function () {
    Object.defineProperty(window, "1", { value: "FAIL2", configurable: true,
                                         writable: true });
  });
  y.parentNode.removeChild(y);
  ok(!("1" in window), "We no longer have two subframes, again");
  is(window[1], undefined, "We should not have a value here either");

  // More set() hook test
  throws(TypeError, function () {
    "use strict";
    window[1] = "FAIL3 strict";
  });
  window[1] = "FAIL3";
  ok(!("1" in window), "We shouldn't allow indexed expandos");
  is(window[1], undefined, "We should not have a value for an indexed expando");
  var desc = Object.getOwnPropertyDescriptor(window, "1");
  is(desc, undefined, "We really really shouldn't have indexed expandos");

  x.parentNode.appendChild(y);
  is(window[1], y.contentWindow, "Second frame should now be visible");
  desc = Object.getOwnPropertyDescriptor(window, "1");
  ok(desc.configurable, "Subframe should be configurable");
  ok(desc.enumerable, "Subframe should be configurable");
  ok(!desc.writable, "Subframe should not be writable");
  is(desc.value, y.contentWindow, "Subframe should have correct value");

  y.parentNode.removeChild(y);
  is(window[1], undefined, "And now we should be back to no [1] property");

  // And more defineProperty()
  throws(TypeError, function () {
    Object.defineProperty(window, "1", { value: "FAIL2", configurable: true,
                                         writable: true });
  });
  ok(!("1" in window), "Defining indexed properties really just shouldn't work");
  is(window[1], undefined, "Defining past end of list should not work");

  // Enumeration tests
  x.parentNode.appendChild(y);

  var names = Object.getOwnPropertyNames(window);
  is(names[0], "0", "Must start with 0");
  is(names[1], "1", "Must continue with 1");
  is(names.indexOf("2"), -1, "And 2, an attempted expando, should not be in there");
  is(names.indexOf("3"), -1, "But no 3; that's on the proto");

  names = [];
  for (var name in window) {
    names.push(name);
  }
  is(names[0], "0", "Enumeration must start with 0");
  is(names[1], "1", "Enumeration must continue with 1");
  is(names.indexOf("2"), -1, "Enumeration: but no expando 2");
  isnot(names.indexOf("3"), -1, "Enumeration: and then 3, defined on the proto");
  is(names.indexOf("4"), -1, "But no 4 around");

  // Delete tests
  is(delete window[1], false, "Deleting supported index should return false");
  is(window[1], y.contentWindow, "Shouldn't be able to delete a supported index");
  y.parentNode.removeChild(y);
  is(window[1], undefined,
     "And now we should have no property here");
  is(delete window[1], true, "Deleting unsupported index should return true");
  is(window[1], undefined,
     "And we shouldn't have things magically appear due to delete");
  </script>
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